git_commit_gpg_signed

Assert every commit in scope has a verifying signature (git verify-commit exits 0). A commit that is unsigned — or signed with a key that doesn’t verify against the local keyring — fires one violation. Demand: kernel maintainers, security-sensitive OSS, anyone using GitHub’s “Require signed commits” branch protection.

# Every commit in the PR must carry a verifying signature.
- id: signed-commits
  kind: git_commit_gpg_signed
  since: "{{env.ALINT_BASE_SHA | default('origin/main')}}"
  level: error

The rule reflects git’s own verdict and deliberately does not distinguish “unsigned” from “signed with an untrusted key” — trust is git’s GPG config / .git/allowed_signers, not this rule’s job. No configuration knobs. Shares the commit-validation family’s since: / include_merges: semantics and failure modes.

Options

Option	Type	Required	Default	Description
include_merges	boolean		false	When validating a range (since: set), include merge commits. Has no effect when since: is unset; combining include_merges: true with no since: is a load-time error.
since	string		null	Git ref to use as the base of the commit range. When set, validates every commit in <since>..HEAD instead of just HEAD. Accepts anything git rev-parse does. Use the canonical {{env.X}} interpolation to pass a SHA via an env var, e.g. since: "{{env.ALINT_BASE_SHA | default('origin/main')}}".

Plus the common level, id, and when fields. This rule analyses the whole repository, so it takes no paths. This table is generated from the JSON Schema; option types and defaults are authoritative.